Twisting has the effect of adding 1:

x® x + 1

Turning transforms any number into the negative of its reciprocal:

x® - 1
x

Starting at zero, the first five moves:
Twist, twist, twist, turn, twist
produces:

0, 1, 2, 3, - 1
3
 , 2
3


Can you continue from there and then return to zero?

You can use the reciprocal button on a calculator (
1
x

) to help with the calculations.

Take another look at the video. Can you spot the strategy they used to get back to 0?